Snap Gauges provide a quick and easy method of checking outside diameters, grooved diameters or width dimensions. When these gauges are manufactured, GO & NO-GO tolerance dimensions of the component being checked are set into the snap gauge.



Snap gauges are oftentimes used when a large quantity of work pieces must be inspected.

The Snap Gauges Has Four Anvils Or Jaws:

1. The first one or pair (outermost) are set using the upper limit (GO tolerance) of the part.

2. The inner set adjusted to the lower limit (NO-GO tolerance) of the part.

A correctly machined part will pass the first set of jaws and stop at the second set of jaws. And that’s it, end of test.


In this manner, a part may be checked in one action, unlike the plug gauge that needs to be used twice and flipped to access the second gauge.

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